Dear Alessandro,
Thanks for you quick response 
yes i activated the BC sets COMMON and R3 BC set as well, also i configured the AUTH scenario to the connector and created connector and assigned to connector groups and generated SOD rule set also
SYNC jobs Authorization sync data and repository sync job.
i cant able to understand why i am not able to get firefighter username in NWBC to assign firefighter id to perform FF actions but i can able to get FF controller, FF owners also ff user id which is created in backend system
i have assigned FF mgt user role(SAP_GRIA_SUPER_USER_MGMT_USER) which seems to be changed in SP21 but still firefighter name not coming up in NWBC
please throw me some light how to fix this issue.
Regards,
Radhakrishnan